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d3.js - 插入填充,使点不与 y 或 x 轴重叠

转载 作者:行者123 更新时间:2023-12-02 19:28:40 25 4
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我在 D3 中创建了这个图:http://bl.ocks.org/cddesja/aee65f660c24cb2144fd

有两件事我想改变。

1) 我想让我的点都不与 y 或 x 轴重叠。我想我可以使用 transform() 创建一点缓冲区,但这会在 x 和 y 轴线之间产生间隙,这是我不想要的。我应该如何正确地做到这一点?

2) 我想去掉 x 和 y 线交叉处的刻度线。我希望一旦我移动刻度线(以及随后的点和线),这些刻度线就会自动消失。我不知道这是不是真的。

提前致谢。克里斯

最佳答案

1.) 这是由 domain 控制的你的体重秤。由于您的域设置为数据范围,因此轴从此处开始。简单的解决方法是将您的域增加到范围的 +- N%。另外,我建议删除 .nice() 因为您最终会与它争夺范围的控制权。

// get extents and range
var xExtent = d3.extent(data, function(d) { return d.grade; }),
xRange = xExtent[1] - xExtent[0],
yExtent = d3.extent(data, function(d) { return d.bin; }),
yRange = yExtent[1] - yExtent[0];

// set domain to be extent +- 5%
x.domain([xExtent[0] - (xRange * .05), xExtent[1] + (xRange * .05)]);
y.domain([yExtent[0] - (yRange * .05), yExtent[1] + (yRange * .05)]);

2.) 这是由 outerTickSize 控制的选项。只需将其设置为零即可。

var yAxisLeft = d3.svg.axis()
.scale(y)
.ticks(yTicks)
.outerTickSize(0) //<-- set to zero
.orient("left");
<小时/>

完整的工作代码示例:

<!DOCTYPE html>
<html>
<meta charset="utf-8">
<head>
<title>Proportion of Students Suspended <body></body> Grade</title>
<style type="text/css">
body {
font: 10px Helvetica;
}
.axis path,
.axis line {
fill: none;
stroke: #000;
shape-rendering: crispEdges;
}
</style>

</head>
<body>
<script src="//d3js.org/d3.v3.min.js" charset="utf-8"></script>

<script type="text/javascript">
// Set up the margins
var margin = {top: 50, right: 50, bottom: 30, left: 50},
width = 1000 - margin.left - margin.right,
height = 500 - margin.top - margin.bottom
yTicks = 5

var x = d3.scale.linear()
.range([0, width]);

var y = d3.scale.linear()
.range([height, 0]);

var xAxisBot = d3.svg.axis()
.scale(x)
.outerTickSize(0)
.orient("bottom");

var xAxisTop = d3.svg.axis()
.scale(x)
.tickFormat('')
.outerTickSize(0)
.orient("top");

var yAxisLeft = d3.svg.axis()
.scale(y)
.ticks(yTicks)
.outerTickSize(0)
.orient("left");

var yAxisRight = d3.svg.axis()
.scale(y)
.ticks(yTicks)
.tickFormat('')
.outerTickSize(0)
.orient("right");

var line = d3.svg.line()
.x(function(d) { return x(d.grade); })
.y(function(d) { return y(d.bin); });

var svg = d3.select("body").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");

var data = [{"grade":1,"bin":0.0398,"number":14943,"total":3.2306},{"grade":2,"bin":0.0605,"number":14128,"total":3.3778},{"grade":3,"bin":0.0777,"number":13590,"total":3.4621},{"grade":4,"bin":0.103,"number":13147,"total":3.7474},{"grade":5,"bin":0.1207,"number":12936,"total":3.7055},{"grade":6,"bin":0.202,"number":12857,"total":5.2757},{"grade":7,"bin":0.2534,"number":12962,"total":5.7908},{"grade":8,"bin":0.2561,"number":13362,"total":5.7759},{"grade":9,"bin":0.1873,"number":16618,"total":5.8429},{"grade":10,"bin":0.168,"number":14996,"total":5.4448},{"grade":11,"bin":0.1178,"number":13119,"total":4.3997},{"grade":12,"bin":0.0605,"number":12061,"total":3.8986}];

var xExtent = d3.extent(data, function(d) { return d.grade; }),
xRange = xExtent[1] - xExtent[0],
yExtent = d3.extent(data, function(d) { return d.bin; }),
yRange = yExtent[1] - yExtent[0];

x.domain([xExtent[0] - (xRange * .05), xExtent[1] + (xRange * .05)]);
y.domain([yExtent[0] - (yRange * .05), yExtent[1] + (yRange * .05)]);

svg.append("g")
.attr("class", "x axis")
.attr("transform", "translate(0," + height + ")")
.call(xAxisBot)
.append("text")
.attr("class", "label")
.attr("x", width/2)
.attr("y", 28)
.style("text-anchor", "end")
.text("Grade");

svg.append("g")
.attr("class", "x axis")
.call(xAxisTop);

svg.append("g")
.attr("class", "y axis")
.call(yAxisLeft)
.append("text")
.attr("class", "label")
.attr("transform", "rotate(-90)")
.attr("y", -40)
.attr("x", -(height / 5))
.attr("dy", ".71em")
.style("text-anchor", "end")
.text("Proportion of Students Suspended at Least Once");

svg.append("g")
.attr("class", "y axis")
.attr("transform", "translate(" + width + ", 0)")
.call(yAxisRight);

svg.append("path")
.datum(data)
.attr("class", "line")
.attr("d", line)
.style("fill", "none")
.style("stroke", "#3B3A35")
.style("stroke-width", "1.5px");



svg.selectAll(".dot")
.data(data)
.enter().append("circle")
.attr("class", "dot")
.attr("r", function(d) { return 10; })
.attr("cx", function(d) { return x(d.grade); })
.attr("cy", function(d) { return y(d.bin); })
.attr("transform", "translate(0, 0)")
.on("mouseover", function(d) {

//Get this bar's x/y values, then augment for the tooltip
var xPosition = parseFloat(d3.select(this).attr("cx")) + 0;
var yPosition = parseFloat(d3.select(this).attr("cy")) + 0;

d3.select(this)
.transition()
.duration(500)
.style("fill-opacity", .35)
.attr("r", 20)
})
.on("mouseout", function() {
//Hide the tooltip
d3.select(this)
.transition()
.duration(500)
.style("fill-opacity", 1)
.attr("r", function(d) { return 10; });
})
.style("fill", "#3B3A35")
.style("stroke", "#3B3A35")
.style("stroke-width", "1.2px");
</script>
</body>
</html>

关于d3.js - 插入填充,使点不与 y 或 x 轴重叠,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34888205/

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